MCQ
An elements in $+3$ oxidation state has the electronic configuration $(Ar)3{d^3}$. Its atomic number is
- ✓$24$
- B$23$
- C$22$
- D$21$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Choose the correct statement($s$).
$(A)$ The order of basicity is $II > I > III > IV$ .
$(B)$ The magnitude of $p K_{ b }$ difference between $I$ and $II$ is more than that between $III$ and $IV$.
$(C)$ Resonance effect is more in $III$ than in $IV$.
$(D)$ Steric effect makes compound $IV$ more basic than $III$.
Spin only magnetic moment of $Fe$ in $\left[ Fe \left( H _2 O \right)_6\right]^{3+}$ and $\left[ Fe ( CN )_6\right]^{3-}$ complexes respectively is:

|
${List-I }$ ${(Reactants) }$ |
${List-II }$ ${ Products }$ |
| ($A$)Phenol, $\mathrm{Zn} / \Delta$ |
$(I)$ Salicylaldehyde |
| ($B$)Phenol, $\mathrm{CHCl}_3, \mathrm{NaOH}, \mathrm{HCl}$ |
$(II)$ Salicylic acid |
| ($C$)Phenol, $\mathrm{CO}_2, \mathrm{NaOH}, \mathrm{HCl}$ |
$(III)$ Benzene |
| ($D$)Phenol, Conc. $\mathrm{HNO}_3$ |
$(IV)$ Picric acid |